Jhonathan Diaz vs. Roy Witherup — Career Comparison

On the career pitching numbers, Roy Witherup posted a stronger line than Jhonathan Diaz. Roy Witherup posted stronger numbers in ERA (4.44 vs 4.66) and WHIP (1.454 vs 1.705). By the career numbers, Roy Witherup had the better of this comparison — though ERA and WHIP alone don't account for era, park factors, or the defenses each pitcher worked behind.